CMS Demo Server

Please do not pay much attention to the look of the finished sites.
These demos are focused primarily on the administrative backend of each CMS, and the end result is about the same for each, with the big differences being administration and ease of use.
Admin User Credentials:
These are the same across all the sites.

Username: test
Password: Password1!

Wordpress is a very capable CMS. Its primary purpose is blogging, but it can also be used for more traditional sites. Extensive tutorials and documentation is available both on YouTube and on the WordPress Codex. The main disadvantage of WordPress is that it is often hard to customize without creating a bloated install that's sluggish for administrators and the public internet.
Page Editor Pseudo-WYSIWYG
Blog Function Yes
SQL Database Yes
Page Load Speed Mediocre

Anchor CMS

Anchor is a very simple CMS. It has a minimalist administration backend, and uses Markdown to edit pages. It has good support for blog posts, but lacks the organizational features (such as post tags) of larger CMSes like WordPress. It is easy to add custom styling to Anchor sites, and if you prefer the page editor that Grav uses, Anchor can be modified to use the same editor.
Page Editor Markdown
Blog Function Yes
SQL Database Yes
Page Load Speed Good

Grav is different from most CMSes because it does not require an SQL database. This cuts down on server overhead, as well as page load time. Grav also uses the simple Markdown language in its page editor, and has an excellent administration interface. However, it is not possible to run a blog with Grav.
Page Editor Markdown
Blog Function No
SQL Database No
Page Load Speed Excellent